Operability And Fitness-for-Service (FFS) Of ASME Equipment In Nuclear Power Plants

Bringing Order and Logic to the Evaluation Process There is a multitude of documents and reports that describe the damage mechanisms of ASME pressure equipment (vessels, pumps, valves, piping, and tanks, and their supports) in nuclear power plants. Thousands of pages published by EPRI, the NRC, ASME, NACE, research laboratories, utilities, contractors, and others, to […]

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ASME Section VIII, Division 1 – 2019 Edition – Changes to U-2(g)

What Do You Do When There Are No Rules? On July 1, 2019, the 2019 Edition of ASME Section VIII, Division 1 will be published.  Among the 117 changes to this Edition will be a revised paragraph U-2(g), and a new Mandatory Appendix 46.  The new U-2(g) will read: (g) This Division of Section VIII […]

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Basics of Design By Analysis in ASME Section VIII, Division 2

How hard can it be?  I’ve heard from several (unnamed) analysts that because they have access to an FEA program and have successfully applied FEA in other fields, that FEA for pressure vessels should be a snap.  What is it about FEA for pressure vessels that makes it unique? I was recently discussing with another […]

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Five Keys to a Cost-Effective Repair/Modification Package for Tanks-Vessels-Piping

: Process: Does the repair change the process chemistries, physics (fluid phase), and thermo-hydraulics (flow rates, pressures, temperatures)? Does the modification change the control room indications and the operating envelopes? Material: Are the selected metallic materials (base metal and welds) and non-metallic materials (gaskets, packings, etc.) compatible with the existing materials, with the environment, and […]

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Repair of Pressure Equipment and Piping in Nuclear Power Plants- Navigating ASME XI Repairs with PCC-2 as a Roadmap

Download/View as PDF Summary – This article assists engineers in selecting ASME XI options for the repair of ASME III nuclear components. In summary, the repair options in ASME XI are dispersed throughout Section XI and Code Cases, while, in contrast, the ASME PCC-2 repair standard (for non-safety related components) lists repair options in a […]

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Design/Specification of FCC Replacement Parts and Upgrades

Overview Fluid Catalytic Cracking (FCC) units were first developed in the 1930s. Over the years this technology has evolved and it is one of the most important processes used in refineries. The FCC units are used to convert high boiling point, high molecular weight hydrocarbon fractions of crude oils to gasoline, olefinic gases, and other products. […]

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State Approval of Used or Relocated Pressure Vessels

Achieving “State Special” designation for a pressure vessel can require a fair amount of effort in documentation development.   This process is warranted – for example – when a company wants to move a pressure vessel from one facility for operation in a facility located in another state, or when they purchase a used vessel located […]

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Determining “Life” of Bulged Coke Drum

My previous blog on Equipment Health Monitoring (EHM) explains why EHM can be used to improve fatigue life of a coke drums. As explained in this blog, one of the critical locations to be monitored are the circumferential weld seams – where high thermal stresses occur during the operation of the drum. These high stresses over […]

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Brittle Fracture Resistance Workbook API 579-1/ASME FFS-1 Approach (Fitness-For-Service)

Description Process vessels such as towers, drums and heat exchangers may be exposed to low temperatures as a part of normal operation or as the result of an upset condition. Carbon and low alloy steels typically used in process vessels undergo a transition from ductile to brittle behavior as temperature is reduced and are at […]

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Management of Aged Equipment Lacking Documentation

Proper inspection, maintenance and operation of aging equipment has become an important issue in today’s process and power industries. Industry codes and standards typically deal with the design of new equipment. More recently other codes and standards have been developed to deal with the repair, rerating or change of service of equipment dating back as […]

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